The Seeker is what the parallel universe refers to the player as - a nickname originally given during initial connections by Henry. It is subjective what various groups think the Seeker is seeking. Some think it is knowledge. Others believe they are a 'Seeker' meant to shape the world in the Guardian Prophecy. The meaning of the word should therefore not be taken as a blanket statement of purpose. The player is often given a chance to define what it is he/she is seeking from the game.
Zeus is aware of the Seeker on August 23, 2041.[1]